Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / dsinit.c
1 /******************************************************************************
2  *
3  * Module Name: dsinit - Object initialization namespace walk
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2012, Intel Corp.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acdispat.h"
47 #include "acnamesp.h"
48 #include "actables.h"
49
50 #define _COMPONENT          ACPI_DISPATCHER
51 ACPI_MODULE_NAME("dsinit")
52
53 /* Local prototypes */
54 static acpi_status
55 acpi_ds_init_one_object(acpi_handle obj_handle,
56                         u32 level, void *context, void **return_value);
57
58 /*******************************************************************************
59  *
60  * FUNCTION:    acpi_ds_init_one_object
61  *
62  * PARAMETERS:  obj_handle      - Node for the object
63  *              Level           - Current nesting level
64  *              Context         - Points to a init info struct
65  *              return_value    - Not used
66  *
67  * RETURN:      Status
68  *
69  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
70  *              within the namespace.
71  *
72  *              Currently, the only objects that require initialization are:
73  *              1) Methods
74  *              2) Operation Regions
75  *
76  ******************************************************************************/
77
78 static acpi_status
79 acpi_ds_init_one_object(acpi_handle obj_handle,
80                         u32 level, void *context, void **return_value)
81 {
82         struct acpi_init_walk_info *info =
83             (struct acpi_init_walk_info *)context;
84         struct acpi_namespace_node *node =
85             (struct acpi_namespace_node *)obj_handle;
86         acpi_object_type type;
87         acpi_status status;
88
89         ACPI_FUNCTION_ENTRY();
90
91         /*
92          * We are only interested in NS nodes owned by the table that
93          * was just loaded
94          */
95         if (node->owner_id != info->owner_id) {
96                 return (AE_OK);
97         }
98
99         info->object_count++;
100
101         /* And even then, we are only interested in a few object types */
102
103         type = acpi_ns_get_type(obj_handle);
104
105         switch (type) {
106         case ACPI_TYPE_REGION:
107
108                 status = acpi_ds_initialize_region(obj_handle);
109                 if (ACPI_FAILURE(status)) {
110                         ACPI_EXCEPTION((AE_INFO, status,
111                                         "During Region initialization %p [%4.4s]",
112                                         obj_handle,
113                                         acpi_ut_get_node_name(obj_handle)));
114                 }
115
116                 info->op_region_count++;
117                 break;
118
119         case ACPI_TYPE_METHOD:
120
121                 info->method_count++;
122                 break;
123
124         case ACPI_TYPE_DEVICE:
125
126                 info->device_count++;
127                 break;
128
129         default:
130                 break;
131         }
132
133         /*
134          * We ignore errors from above, and always return OK, since
135          * we don't want to abort the walk on a single error.
136          */
137         return (AE_OK);
138 }
139
140 /*******************************************************************************
141  *
142  * FUNCTION:    acpi_ds_initialize_objects
143  *
144  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
145  *              start_node      - Root of subtree to be initialized.
146  *
147  * RETURN:      Status
148  *
149  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
150  *              necessary initialization on the objects found therein
151  *
152  ******************************************************************************/
153
154 acpi_status
155 acpi_ds_initialize_objects(u32 table_index,
156                            struct acpi_namespace_node * start_node)
157 {
158         acpi_status status;
159         struct acpi_init_walk_info info;
160         struct acpi_table_header *table;
161         acpi_owner_id owner_id;
162
163         ACPI_FUNCTION_TRACE(ds_initialize_objects);
164
165         status = acpi_tb_get_owner_id(table_index, &owner_id);
166         if (ACPI_FAILURE(status)) {
167                 return_ACPI_STATUS(status);
168         }
169
170         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
171                           "**** Starting initialization of namespace objects ****\n"));
172         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
173
174         /* Set all init info to zero */
175
176         ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
177
178         info.owner_id = owner_id;
179         info.table_index = table_index;
180
181         /* Walk entire namespace from the supplied root */
182
183         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
184         if (ACPI_FAILURE(status)) {
185                 return_ACPI_STATUS(status);
186         }
187
188         /*
189          * We don't use acpi_walk_namespace since we do not want to acquire
190          * the namespace reader lock.
191          */
192         status =
193             acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
194                                    ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object,
195                                    NULL, &info, NULL);
196         if (ACPI_FAILURE(status)) {
197                 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
198         }
199         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
200
201         status = acpi_get_table_by_index(table_index, &table);
202         if (ACPI_FAILURE(status)) {
203                 return_ACPI_STATUS(status);
204         }
205
206         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
207                               "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
208                               table->signature, owner_id, info.object_count,
209                               info.device_count, info.method_count,
210                               info.op_region_count));
211
212         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
213                           "%u Methods, %u Regions\n", info.method_count,
214                           info.op_region_count));
215
216         return_ACPI_STATUS(AE_OK);
217 }